Protractor 

The Screen Protractor allows you to easily and quickly measure any angle on the screen to the nearest Degree or Radian. This perfect compliment to the Screen Calipers, the Protractor is simple and easy to use with any program.

The Screen Protracto......

The Cardio Calipers from Iconico.com provide a fast and accurate way to measure electrocardiograms on a computer screen with pixel perfect accuracy.

The Cardio Calipers allow measurement of any EKG, no matter what format the EKG image is in. Simp......

 Protractor